33221223 has 48 divisors (see below), whose sum is σ = 58046976. Its totient is φ = 17899200.

The previous prime is 33221197. The next prime is 33221249. The reversal of 33221223 is 32212233.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (33221197) and next prime (33221249).

It is not a de Polignac number, because 33221223 - 2⁵ = 33221191 is a prime.

It is a super-2 number, since 2×33221223² = 2207299315231458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33221196 and 33221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146236 + ... + 146462.

It is an arithmetic number, because the mean of its divisors is an integer number (1209312).

Almost surely, 2^33221223 is an apocalyptic number.

33221223 is a deficient number, since it is larger than the sum of its proper divisors (24825753).

33221223 is a wasteful number, since it uses less digits than its factorization.

33221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 361 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 33221223 is about 5763.7854748420. The cubic root of 33221223 is about 321.4685851562.

Adding to 33221223 its reverse (32212233), we get a palindrome (65433456).

It can be divided in two parts, 3 and 3221223, that multiplied together give a palindrome (9663669).

The spelling of 33221223 in words is "thirty-three million, two hundred twenty-one thousand, two hundred twenty-three".